How do I enter a 30 sec. delay when I enter my home?

Your delay is set by default. You need to change the zone type of that particular zone to an Enty/exit type. This lets the system know that when that door opens, it will give it the pre-determined delay. On the Ademco panels, this is taken care of in Field 56. Set the Zone Type to 01 or 02. On the GE systems you need to go to Zone Programming and edit that sensors zone type. Set this to 10